package cn.springmvc.service;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.springframework.stereotype.Service;
@Service
public class ExcelServiceImpl <T>  {

	public void exportExcel(String title, String[] headers, Collection<T> dataset, OutputStream out, String pattern) {
		// TODO Auto-generated method stub
	
			// 声明一个工作薄
			HSSFWorkbook workbook = new HSSFWorkbook();
			// 生成一个表格
			HSSFSheet sheet = workbook.createSheet(title);
			// 设置表格默认列宽度为15个字节
			sheet.setDefaultColumnWidth((short) 15);
			// 生成一个样式
			HSSFCellStyle style = workbook.createCellStyle();
			// 设置这些样式
			style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
			style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			// 生成一个字体
			HSSFFont font = workbook.createFont();
			font.setColor(HSSFColor.VIOLET.index);
			font.setFontHeightInPoints((short) 12);
			font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
			// 把字体应用到当前的样式
			style.setFont(font);
			// 生成并设置另一个样式
			HSSFCellStyle style2 = workbook.createCellStyle();
			style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
			style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
			// 生成另一个字体
			HSSFFont font2 = workbook.createFont();
			font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
			// 把字体应用到当前的样式
			style2.setFont(font2);
			// 声明一个画图的顶级管理器
			HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
			// 定义注释的大小和位置,详见文档
			HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
					0, 0, 0, (short) 4, 2, (short) 6, 5));
			// 设置注释内容
			comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
			// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
			comment.setAuthor("leno");
			// 产生表格标题行
			HSSFRow row = sheet.createRow(0);
			for (short i = 0; i < headers.length; i++) {
				HSSFCell cell = row.createCell(i);
				cell.setCellStyle(style);
				HSSFRichTextString text = new HSSFRichTextString(headers[i]);
				cell.setCellValue(text);
			}
			// 遍历集合数据，产生数据行
			Iterator<T> it = dataset.iterator();
			int index = 0;
			while (it.hasNext()) {
				index++;
				row = sheet.createRow(index);
				T t = (T) it.next();
				// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
				Field[] fields = t.getClass().getDeclaredFields();
				for (short i = 0; i < fields.length; i++) {
					HSSFCell cell = row.createCell(i);
					cell.setCellStyle(style2);
					Field field = fields[i];
					String fieldName = field.getName();
					String getMethodName = "get"
							+ fieldName.substring(0, 1).toUpperCase()
							+ fieldName.substring(1);
					try {
						Class tCls = t.getClass();
						Method getMethod = tCls.getMethod(getMethodName,new Class[] {});
						Object value = getMethod.invoke(t, new Object[] {});
						// 判断值的类型后进行强制类型转换
						String textValue = null;
			
						if (value instanceof Boolean) {
							boolean bValue = (Boolean) value;
							textValue = "男";
							if (!bValue) {
								textValue = "女";
							}
						} else if (value instanceof Date) {
							Date date = (Date) value;
							SimpleDateFormat sdf = new SimpleDateFormat(pattern);
							textValue = sdf.format(date);
						} else if (value instanceof byte[]) {
							// 有图片时，设置行高为60px;
							row.setHeightInPoints(60);
							// 设置图片所在列宽度为80px,注意这里单位的一个换算
							sheet.setColumnWidth(i, (short) (35.7 * 80));
							// sheet.autoSizeColumn(i);
							byte[] bsValue = (byte[]) value;
							HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
									1023, 255, (short) 6, index, (short) 6, index);
							anchor.setAnchorType(2);
							patriarch.createPicture(anchor, workbook.addPicture(
									bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
						} else {
							// 其它数据类型都当作字符串简单处理
							textValue = value.toString();
						}
						// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
						if (textValue != null) {
							Pattern p = Pattern.compile("^//d+(//.//d+)?$");
							Matcher matcher = p.matcher(textValue);
							if (matcher.matches()) {
								// 是数字当作double处理
								cell.setCellValue(Double.parseDouble(textValue));
							} else {
								HSSFRichTextString richString = new HSSFRichTextString(
										textValue);
								HSSFFont font3 = workbook.createFont();
								font3.setColor(HSSFColor.BLUE.index);
								richString.applyFont(font3);
								cell.setCellValue(richString);
							}
						}
					} catch (SecurityException e) {
						e.printStackTrace();
					} catch (NoSuchMethodException e) {
						e.printStackTrace();
					} catch (IllegalArgumentException e) {
						e.printStackTrace();
					} catch (IllegalAccessException e) {
						e.printStackTrace();
					} catch (InvocationTargetException e) {
						e.printStackTrace();
					} finally {
						// 清理资源
					}
				}
			}
			try {
				workbook.write(out);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	public void produceSheetData(String title, String[] headers, Collection<T> dataset,HSSFWorkbook workbook ,String pattern){
		
		// 生成一个表格
		HSSFSheet sheet = workbook.createSheet(title);
		// 设置表格默认列宽度为15个字节
		sheet.setDefaultColumnWidth((short) 15);
		// 生成一个样式
		HSSFCellStyle style = workbook.createCellStyle();
		// 设置这些样式
		style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
		style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		// 生成一个字体
		HSSFFont font = workbook.createFont();
		font.setColor(HSSFColor.VIOLET.index);
		font.setFontHeightInPoints((short) 12);
		font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		// 把字体应用到当前的样式
		style.setFont(font);
		// 生成并设置另一个样式
		HSSFCellStyle style2 = workbook.createCellStyle();
		style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
		style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		// 生成另一个字体
		HSSFFont font2 = workbook.createFont();
		font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		// 把字体应用到当前的样式
		style2.setFont(font2);
		// 声明一个画图的顶级管理器
		HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
		// 定义注释的大小和位置,详见文档
		HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
				0, 0, 0, (short) 4, 2, (short) 6, 5));
		// 设置注释内容
		comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
		// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
		comment.setAuthor("leno");
		// 产生表格标题行
		
		// 产生表格标题行
		HSSFRow row = sheet.createRow(0);
		for (short i = 0; i < headers.length; i++) {
			HSSFCell cell = row.createCell(i);
			cell.setCellStyle(style);
			HSSFRichTextString text = new HSSFRichTextString(headers[i]);
			cell.setCellValue(text);
		}
		
		// 遍历集合数据，产生数据行
					Iterator<T> it = dataset.iterator();
					int index = 0;
					while (it.hasNext()) {
						index++;
						row = sheet.createRow(index);
						T t = (T) it.next();
						// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
						Field[] fields = t.getClass().getDeclaredFields();
						for (short i = 0; i < fields.length; i++) {
							HSSFCell cell = row.createCell(i);
							cell.setCellStyle(style2);
							Field field = fields[i];
							String fieldName = field.getName();
							String getMethodName = "get"
									+ fieldName.substring(0, 1).toUpperCase()
									+ fieldName.substring(1);
							try {
								Class tCls = t.getClass();
								Method getMethod = tCls.getMethod(getMethodName,
										new Class[] {});
								Object value = getMethod.invoke(t, new Object[] {});
								// 判断值的类型后进行强制类型转换
								String textValue = null;
					
								if (value instanceof Boolean) {
									boolean bValue = (Boolean) value;
									textValue = "男";
									if (!bValue) {
										textValue = "女";
									}
								} else if (value instanceof Date) {
									Date date = (Date) value;
									SimpleDateFormat sdf = new SimpleDateFormat(pattern);
									textValue = sdf.format(date);
								} else if (value instanceof byte[]) {
									// 有图片时，设置行高为60px;
									row.setHeightInPoints(60);
									// 设置图片所在列宽度为80px,注意这里单位的一个换算
									sheet.setColumnWidth(i, (short) (35.7 * 80));
									// sheet.autoSizeColumn(i);
									byte[] bsValue = (byte[]) value;
									HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
											1023, 255, (short) 6, index, (short) 6, index);
									anchor.setAnchorType(2);
									patriarch.createPicture(anchor, workbook.addPicture(
											bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
								} else {
									// 其它数据类型都当作字符串简单处理
									textValue = value.toString();
								}
								// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
								if (textValue != null) {
									Pattern p = Pattern.compile("^//d+(//.//d+)?$");
									Matcher matcher = p.matcher(textValue);
									if (matcher.matches()) {
										// 是数字当作double处理
										cell.setCellValue(Double.parseDouble(textValue));
									} else {
										HSSFRichTextString richString = new HSSFRichTextString(
												textValue);
										HSSFFont font3 = workbook.createFont();
										font3.setColor(HSSFColor.BLUE.index);
										richString.applyFont(font3);
										cell.setCellValue(richString);
									}
								}
							} catch (SecurityException e) {
								e.printStackTrace();
							} catch (NoSuchMethodException e) {
								e.printStackTrace();
							} catch (IllegalArgumentException e) {
								e.printStackTrace();
							} catch (IllegalAccessException e) {
								e.printStackTrace();
							} catch (InvocationTargetException e) {
								e.printStackTrace();
							} finally {
								// 清理资源
							}
						}
					}
	}
	}


